Sc KEY STAGE 3 TIER 5 7 Science test Paper 2 First name Last name School 2008 Remember The test is 1 hour long. You will need: pen, pencil, rubber, ruler, protractor and calculator. The test starts with easier questions. Try to answer all of the questions. The number of marks available for each question is given below the mark boxes in the margin. You should not write in this margin. If you are asked to plan an investigation, there will be space for you to write down your thoughts and ideas. Do not use any rough paper. Check your work carefully. Ask your teacher if you are not sure what to do. For marker s use only TOTAL MARKS
1. (a) The diagrams below show the patterns produced on an oscilloscope by three different sound waves. A B C (i) Which two waves have the same loudness? Write the letters. and How do the diagrams show this? 1ai (ii) Which two waves have the same pitch? Write the letters. and How do the diagrams show this? 1aii (iii) Shuli is listening to a sound that produces the pattern below. X Y Describe how the sound that Shuli hears changes between X and Y. 1aiii KS3/08/Sc/Tier 5 7/P2 2
(b) The table below shows the maximum time a person can listen to music at different sound levels without damage to the ear. sound level (decibels) maximum time (hours) 86 8 88 4 90 2 92 1 94 0.5 Estimate the maximum time a person could listen to a sound of 87 decibels. hours 1b (c) The diagram below shows part of the human ear. ear drum What happens to the ear drum as a sound gets louder? 1c KS3/08/Sc/Tier 5 7/P2 3 maximum 5 marks Total 5
2. Jenny put a spring She pressed the She let go of the spring over a wooden rod. spring down 2 cm. and measured the height it reached. wooden rod height reached spring 2 cm Jenny repeated her experiment. She pressed the spring down more each time. Her results are shown in the graph below. not to scale 90 80 70 60 height the spring reached (cm) 50 40 30 20 10 0 0 1 2 3 4 5 distance the spring was pressed down (cm) KS3/08/Sc/Tier 5 7/P2 4
(a) Use Jenny s graph to complete the table below. distance the spring was pressed down (cm) height the spring reached (cm) 2 3 4 2a (b) Jenny said, If I double the distance I press the spring down, the height it reaches will also double. How do the results show she was wrong? 2b (c) This diagram shows the moving spring in three different positions. C Complete the sentences below by choosing words from the box. You can use each word more than once. B height reached most some least A (i) When the spring is moving at B it has kinetic energy and gravitational potential energy. 2ci (ii) When the spring reaches C it has gravitational potential energy and kinetic energy. 2cii (iii)when the spring stops at A it has kinetic energy and gravitational potential energy. maximum 5 marks 2ciii Total KS3/08/Sc/Tier 5 7/P2 5 5
3. (a) The diagram below shows a fish tank. The surface of the water acts like a mirror. The fish can see the snail reflected in the surface of the water. surface of water (mirror) 3a 3a 3a Draw a ray of light which passes from the snail, and reflects from the surface, to show how the fish can see the snail. Use a ruler. Put arrows on the ray of light. KS3/08/Sc/Tier 5 7/P2 6
(b) Andrew is looking at the snail. Andrew air water When a ray of light passes from water to air it changes direction. (i) Draw a ray of light from the snail to Andrew to show how Andrew can see the snail. Use a ruler. Put arrows on the ray of light. 3bi 3bi (ii) What is the name given to this change in the direction of a ray of light? 3bii KS3/08/Sc/Tier 5 7/P2 7 maximum 6 marks Total 6
4. Paul had four substances: citric acid copper sulphate indigestion tablet sugar He dissolved 1 g of each substance in 20 cm 3 of distilled water. He used universal indicator to find the ph of each solution. (a) (i) Sugar solution does not change the colour of green universal indicator. What does this tell you about sugar solution? Tick the correct box. It is an acid. It is an alkali. 4ai It is neutral. It is sweet. (ii) Suggest the ph of citric acid. 4aii (iii) Indigestion tablets neutralise acid in the stomach. What does this tell you about indigestion tablets? 4aiii KS3/08/Sc/Tier 5 7/P2 8
(b) Complete the flow chart below with the names of the substances in the boxes. citric acid copper sulphate indigestion tablet sugar Does the substance dissolve in water to form a blue solution? yes no Does it turn universal indicator red? yes no Does it turn universal indicator blue? 4b yes no 4b 4b maximum 6 marks Total KS3/08/Sc/Tier 5 7/P2 9 6
5. The drawing below shows a gemstone set in a gold ring. Crystals of gemstones are found in different rocks. (a) There are three groups of rocks: igneous metamorphic sedimentary (i) Crystals can be found in rocks that have been changed into different rocks by high temperature and high pressure. Which group of rocks is formed in this way? 5ai (ii) Crystals can be found in rocks formed by the cooling of hot magma. Which group of rocks is formed in this way? 5aii (b) How does the rate at which magma cools affect the size of the crystals formed? 5b KS3/08/Sc/Tier 5 7/P2 10
(c) Gemstones called rubies are made from an aluminium compound with the formula Al 2 O 3. The chemical symbol for aluminium is Al. (i) Give the name of the element that is combined with aluminium in this compound. 5ci (ii) Suggest the name of the compound with the formula AI 2 O 3. 5cii (iii) How many atoms are there in the formula Al 2 O 3? 5ciii (d) (i) The gemstone in the drawing is set into a gold ring. Gold is an element that is found in rocks. Gold is never found combined with other elements. Part of the reactivity series of metals is shown below. more reactive less reactive aluminium zinc lead copper Where should gold be placed in this reactivity series? 5di (ii) The more reactive metals react with acids. Complete the word equation for the reaction of zinc with hydrochloric acid. 5dii zinc + hydrochloric + acid 5dii KS3/08/Sc/Tier 5 7/P2 11 maximum 9 marks Total 9
6. The table below shows the mass of six nutrients in 100 cm 3 of three types of milk. nutrient 100 cm 3 of human milk 100 cm 3 of cows milk 100 cm 3 of milk made from baby-milk powder carbohydrate (g) 7.4 5.0 7.2 fat (g) 4.2 3.7 3.6 protein (g) 1.1 3.5 1.5 calcium (mg) 35.0 120.0 49.0 iron (mg) 0.075 0.05 0.9 vitamin C (mg) 3.8 1.5 6.9 (a) A scientist compared the three types of milk. Why was it a fair comparison? 6a (b) Both human milk and milk made from baby-milk powder contain more sugar than cows milk. Which data in the table supports this? 6b KS3/08/Sc/Tier 5 7/P2 12
(c) Why do we need calcium in our diet? 6c (d) (i) Baby-milk powder is made from cows milk. What evidence is there in the table that iron is added when making baby-milk powder? 6di (ii) Why do we need iron in our diet? 6dii (e) A pupil said, There is more vitamin C than protein in human milk. How can you tell from the table that the pupil was wrong? 6e KS3/08/Sc/Tier 5 7/P2 13 maximum 6 marks Total 6
7. The diagram below shows a plant cell. chloroplast cell wall cytoplasm nucleus vacuole cell membrane (a) In which part of a plant would you find this type of cell? 7a (b) (i) Give the function of the nucleus. 7bi (ii) Give the function of the chloroplasts. 7bii (iii) Give the function of the cell wall. 7biii 7c (c) Give the names of two labelled parts that are not present in animal cells. 7c 1. 2. KS3/08/Sc/Tier 5 7/P2 14
(d) Tick one box in each row to show whether the statement is true for photosynthesis or for respiration. statement photosynthesis respiration carbon dioxide is produced light is needed it occurs in plants and animals oxygen is produced 7d 7d KS3/08/Sc/Tier 5 7/P2 15 maximum 8 marks Total 8
8. Mary used the apparatus below to test the strength of an electromagnet. She used the reading on the newton meter to measure the force of the magnet on the iron disc. 0 1 2 3 4 5 N newton meter iron disc iron core fixed inside coil power supply 100 turns in coil (a) Explain why the reading on the newton meter increases when a current passes through the coil. 8a 8a (b) When a current passes through the coil, some of the electrical energy is changed to thermal energy. What would happen to the coil if the current passing through it was too large? 8b KS3/08/Sc/Tier 5 7/P2 16
(c) Mary made two electromagnets, one with 100 turns of wire in the coil and one with 200 turns. She varied the current through the coil of each electromagnet. She measured the force of each electromagnet on the iron disc. The graph shows her results. 2.4 200 turns in coil 2.2 2.0 1.8 1.6 force on iron disc (N) 1.4 1.2 1.0 0.8 0.6 0.4 100 turns in coil 0.2 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 current through coil (A) Write two conclusions that Mary could make from these results. 1. 8c 2. 8c KS3/08/Sc/Tier 5 7/P2 17 maximum 5 marks Total 5
9. Neera and Tom dissolved different masses of salt in 500 cm 3 of water. They measured the temperature at which each salt solution boiled. thermometer salt solution (a) They wrote down the variables that might affect the investigation. temperature of the laboratory boiling point of salt solution mass of salt dissolved in water volume of water starting temperature of the water type of salt used (i) What is the independent variable (the variable they changed) in their investigation? 9ai (ii) What is the dependent variable (the variable they measured) in their investigation? 9aii (iii) Which variable above would affect the experiment the least? 9aiii KS3/08/Sc/Tier 5 7/P2 18
(b) Neera and Tom plotted their results and drew the graphs shown below. 110 108 boiling point ( C) 106 104 102 100 98 0 10 20 30 40 mass of salt added (g) 50 60 110 108 boiling point ( C) 106 104 102 100 98 0 10 20 30 40 50 60 mass of salt added (g) (i) How can you tell from the graphs that Neera and Tom started with pure water? 9bi (ii) Why is Tom s line of best fit better than Neera s line of best fit? 9bii KS3/08/Sc/Tier 5 7/P2 19 maximum 5 marks Total 5
10. Diagram A represents a gas in a container. The gas can be compressed by moving the piston to the right. Key nitrogen oxygen piston diagram A (a) (i) How can you tell that the substance in the container is a gas? 10ai (ii) How can you tell from the diagram that the gas is pure? 10aii (b) The piston is moved to the right as shown in diagram B. piston diagram B How can you tell, from diagram B, that the pressure of the gas has increased? 10b KS3/08/Sc/Tier 5 7/P2 20
(c) Diagram C shows what happened to the molecules after the gas was compressed more. piston diagram C (i) How can you tell that a chemical reaction happened when the gas was compressed? 10ci (ii) The mass of the gas in both diagrams B and C was 0.3 g. Why did the mass of the gas not change when it was compressed? 10cii (iii) Complete the table below with the correct chemical formula of each substance. Use the key to help you. substance formula Key nitrogen oxygen 10ciii (iv) What is the name of the substance represented by the symbol? 10civ maximum 7 marks KS3/08/Sc/Tier 5 7/P2 21 Total 7
11. The bar chart below shows how the number of cigarettes smoked is linked to the percentage of deaths from heart disease in the total male population. 1.2 1.0 % of deaths from heart disease in the total male population 0.8 0.6 0.4 age under 45 45 54 55 64 0.2 0 5 10 15 20 number of cigarettes smoked each day (a) Use the information in the bar chart to write two conclusions about the relationship between smoking and the number of male deaths from heart disease. 1. 11a 2. 11a (b) Smoking can cause fat to be deposited in the arteries to the heart muscle. Explain how this could prevent the heart muscle from working properly. 11b 11b 11b KS3/08/Sc/Tier 5 7/P2 22
(c) The drawing below shows part of the lining of the airway leading into the lungs. mucus cilia (i) Describe how mucus and cilia help to keep the airway free of dust and bacteria. mucus 11ci cilia 11ci (ii) Cigarette smoke contains tar. What effect does tar have on the cilia? 11cii KS3/08/Sc/Tier 5 7/P2 23 maximum 8 marks Total 8
12. A builder tried to remove a wooden post from the ground by pulling with a rope. hole B 1.6 m hole A 300 N 0.8 m pivot P ground (a) (i) The builder attached a rope to hole A, 0.8 m above the ground. He pulled with a horizontal force of 300 N. 12ai Calculate the turning moment about the pivot P. Give the unit. 12ai (ii) He then attached a rope to hole B, 1.6 m above the ground. He pulled with a horizontal force. What force would produce the same turning moment as before? 12aii N KS3/08/Sc/Tier 5 7/P2 24
(b) The post breaks off and falls on the ground as shown. The weight of the broken post is 120 N. The area in contact with the ground is 0.2 m 2. Calculate the pressure of the broken post on the ground. Give the unit. 12b 12b END OF TEST KS3/08/Sc/Tier 5 7/P2 25 maximum 5 marks Total 5
BLANK PAGE
BLANK PAGE
QCA/08/3302 (Pupil pack) Qualifications and Curriculum Authority 2008 QCA/08/3298 (Mark scheme pack) 282665